TAG: L5

News courtesy of CANSPACE Listserv. U.S. Air Force Space Command has issued a notice that CNAV capabilities on the GPS L2C and L5 signals will be tested in June. No GPS satellite outages are planned. Below is the official notice. Notice of Test A Notice by the Air Force Department on 03/20/2013 Action: GPS Test Notice. Summary: The purpose of... read more

With apologies to the Bard of Avon, as I paraphrase his prose, 2C or not 2C — that is the question for millions of GPS users and has been for several years. Indeed, over the past seven years hardly a week has gone by without an email or inquiry about the status of the GPS L2C signal. The name “L2C”... read more

JAVAD GNSS has commented on some news that its receivers can track a new L5 signal from the Indian SBAS satellite, GSAT-8, launched on May 20. In a further explanation to GPS World, CEO Javad Ashjaee explained, “All owners of our products can track it. The only thing is that if customers have not updated their firmware for a long time,... read more

Javad Ashjaee, founder and CEO of JAVAD GNSS, has filed a letter with the U.S. Federal Communications Commission (FCC) concerning his company’s development of technical possibilities in GNSS filter designs and components. He states “I hope this will be helpful in establishing realistic guidelines for the characteristics of high-precision GNSS receivers that will be used in critical applications.” Below is... read more

In late March, I conducted a webinar titled "A Closer Look at L5: The Future of High-Precision GNSS," in which I discussed the impact that the new GPS L5 signal/frequency may have on high-precision users. Then, in April I was part of a discussion panel-format webinar titled "LightSquared: Our Story So Far." Many questions and comments arose from both webinars, and I'll attempt to address those in this column. read more

Yesterday I conducted a webinar titled "A Closer Look at L5: The Future of High-Precision GNSS." Preparing for it was quite interesting, so I thought I'd share some of the slides I produced (and had produced) for the webinar. I think you'll find them interesting. read more

A small variance in the L5 signal, which remains well within signal specifications and will not affect pseudorange measurements, may show some impact on triple-frequency combinations of the signal’s carrier phase in high-precision applications. Observations suggest a temperature-dependent line bias in one or more carriers as a likely cause of the observed variation in the tri-carrier combination of L1, L2, and L5. read more